// ----------------------------------------------- //
void keyboard(unsigned char key, int x, int y) {
if (key == GLUT_KEY_ESCAPE)
glutLeaveMainLoop();
else if (key == GLUT_KEY_ENTER || key == ' ')
scenes.next();
else if (key == GLUT_KEY_BACKSPACE)
scenes.prev();
else scenes.current()->start();
}
// ----------------------------------------------- //
void idle() {
scenes.current()->idle();
}
// ----------------------------------------------- //
int main(int argc, char* argv[]) {
// Initialize GLUT
glutInit(&argc, argv);
// Request a double-buffered, RGB display mode.
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
// Specify size and position of a window and create it
glutInitWindowSize(800, 600);
glutInitWindowPosition(10, 10);
glutCreateWindow("Visualization");
glutFullScreen();
ASPECT_RATIO = (float)glutGet(GLUT_SCREEN_WIDTH)/glutGet(GLUT_SCREEN_HEIGHT);
// Initialize GL extensions
glewInit();
if (!GLEW_VERSION_2_0) {
cerr << "OpenGL 2.0 not available\n";
return 1;
}
// Register handlers
glutDisplayFunc(display);
glutKeyboardFunc(keyboard);
glutIdleFunc(idle);
// Lighting and depth testing for non-wireframe scene
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_COLOR_MATERIAL);
glEnable(GL_LINE_SMOOTH); // Line antialiasing
glEnable(GL_POLYGON_SMOOTH);// Polygon antialiasing
glEnable(GL_BLEND); // Antialiasing works only with blending enabled
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glLineWidth(1.1);
scenes.push(new EmptyScene());
scenes.push(new ConstructObjectScene());
scenes.push(new ModelViewTransformScene());
scenes.push(new FrustumScene());
scenes.push(new ProjectionTransformScene());
scenes.push(new MoveClipSpaceIntoViewScene());
scenes.push(new PolygonFillScene("Filling triangles with solid color", false, false));
scenes.push(new LambertScene(false));
scenes.push(new LambertScene(true));
scenes.push(new ShaderScene("../src/diffuse_vertex_shader.glsl", "../src/base_fragment_shader.glsl", "Lambert diffusion with gamma correction"));
scenes.push(new ShaderScene("../src/ambientdiffuse_vertex_shader.glsl", "../src/base_fragment_shader.glsl", "Ambient + Diffuse terms"));
scenes.push(new PhongScene());
scenes.push(new ShaderScene("../src/phong_vertex_shader.glsl", "../src/phong_fragment_shader.glsl", "Phong lighting (per-fragment, no gamma correction)"));
scenes.push(new ShaderScene("../src/phong_vertex_shader.glsl", "../src/phong_fragment_shader_gc.glsl", "Phong lighting (per-fragment, gamma-corrected)"));
scenes.push(new ShaderScene("../src/phong_vertex_shader.glsl", "../src/phong_fragment_shader_hdr.glsl", "Phong lighting (per-fragment, gamma-corrected, HDR)"));
scenes.push(new ShaderScene("../src/phong_vertex_shader.glsl", "../src/blinn_fragment_shader_hdr.glsl", "Blinn lighting (per-fragment, gamma-corrected, HDR)"));
scenes.push(new SpotScene());
scenes.current()->start();
// Run the event loop
glutMainLoop();
for (unsigned int i = 0; i < scenes.size(); i++) delete scenes[i];
return 0;
}
// ----------------------------------------------- //
void display() {
scenes.current()->draw();
glutSwapBuffers();
}